Taxonomic study on the molluscs collected in Marion-Dufresne expedition (MD 55) to SE Brazil: Xenophoridae, Cypraeoidea, mitriforms and Terebridae (Caenogastropoda)
Author
Simone, Luiz Ricardo L.
Author
Cunha, Carlo M.
Museu de Zoologia da Universidade de São Paulo, caixa postal 42494, 04218 - 970 São Paulo, SP (Brazil) lrsimone @ usp. br lrlsimone @ gmail. com
lrsimone@usp.br
text
Zoosystema
2012
2012-12-31
34
4
745
781
http://dx.doi.org/10.5252/z2012n4a6
journal article
10.5252/z2012n4a6
1638-9387
5166650
857CAD31-66E1-4CEE-AB4D-CCD64541D0EF
Lamellaria
spp.
(
Fig. 3G, H
)
MATERIAL EXAMINED
. —
Brazil
,
Espírito Santo
, off Itaúnas, continental slope of Abrolhos,
18°59’S
,
37°48’W
,
607- 620 m
depth,
MNHN
, 1 shell (
MD
55, stn
DC
73, Bouchet,
Leal & Métivier coll.,
27.
V
.1987
).— Off Regência,
19°40’S
,
37°48’W
,
790-940 m
depth,
MNHN
,1 shell (stn
CB
77). — Off Conceição da Barra,
18°59’S
,
37°47’W
,
1540-1550 m
depth,
MNHN
, 3 shells (stn
CD
70,
26.
V
.1987
).
MEASUREMENTS (in mm). — MNHN (stn DC73): 3.7 × 2.7.
DISCUSSION ON LAMELLARIIDS
Typical shells of
Lamellaria
were collected in the three above-mentioned stations. However, nothing more precise than the generic attribution is possible, as the identification of lamellariid species, only based on the vestigial shells, is complicated. Anyway, the shells of the three lots appear to belong to different species. Those of the MNHN lot (stn DC73) are more rounded and with a thicker-walled shell (
Fig.3G, H
). The shell of the MNHN lot(stn DC77) is more elongated and thinner-walled. And the shells of the MNHN lot (stn DC70) are oval, with a wider aperture, and possess delicate transverse undulations on the last whorl. The first indication is that the three lots may represent different species, which only can be defined with additional samples.
Family
PEDICULARIIDAE Gray, 1853